Abstract: A tilt control method includes a tilt control step for automatic control of the tilt (?) of a tilt device (1) by at least one electronic tilt sensor (2) based on gravitational force (G) and by a tilt control device (5), and a sensor test step which is carried out automatically at a test initiation signal, and in case of a malfunction, supplies an error signal (?) which prevents the tilt control step from being carried out.

Abstract: An electro-optical hand-held distance measuring instrument (1) with a housing (2) which can be held in the hand and with an electro-optical distance measurement module (3) with an electric beam source (5) for generating an optical measurement beam (S), a beam receiver (8) for receiving portions of the measurement beam (S) that are backscattered by an object to be measured (MO), and an output device (7) for the determined distance (X). A mechanical distance measuring device (9, 11) is connected to the housing (2).

Abstract: A construction laser with at least one laser beam (4) defining a plane (3) has a laser unit (6) which is tiltable with respect to a housing (5) around at least one swiveling axis (9a) and includes at least one leveling sensor (10a) which is sensitive to the swiveling axis (9a) for a highly precise orientation to the gravitational field (G), and at least one tilt sensor (11a) which is sensitive to the swiveling axis (9a) for direct measurement of an inclination angle [alpha] relative to the gravitational field (G).

Abstract: A tilt control method includes a tilt control step for automatic control of the tilt (?) of a tilt device (1) by at least one electronic tilt sensor (2) based on gravitational force (G) and by a tilt control device (5), and a sensor test step which is carried out automatically at a test initiation signal, and in case of a malfunction, supplies an error signal (?) which prevents the tilt control step from being carried out.

Abstract: A construction laser with at least one laser beam (4) defining a plane (3) has a laser unit (6) which is tiltable with respect to a housing (5) around at least one swiveling axis (9a) and includes at least one leveling sensor (10a) which is sensitive to the swiveling axis (9a) for a highly precise orientation to the gravitational field (G), and at least one tilt sensor (11a) which is sensitive to the swiveling axis (9a) for direct measurement of an inclination angle [alpha] relative to the gravitational field (G).

Abstract: A rotational construction laser includes a housing (17) a laser unit (4) located in the laser housing (17), a device (5) for rotating, at least segmentwise, a laser beam (2) of the laser unit (4) within a rotational plane (R) of a rotational member (6) in which the rotating device (5) is supported for rotational about a rotational axis (A) that intersects a beam axis (S) of the rotatable laser beam (2), and an arrangement for inclinably supporting the rotation axis (A) in at least one pivot plane (E1) and including a mounting frame (3) and a universal ball joint support (7) arranged in the mounting frame (3), with the rotating device (5) being located in a central point (M) of a universal ball joint (8) supported in the universal ball joint support (7).

Abstract: A light beam receiver for a laser beam (2) of a laser positioning device comprising a diffuse reflection surface (3) embodies a reflection surface (3) and at least one reflector surface (4a, 4b) facing the laser beam (2) inclined at an angle (?)<45°.

Abstract: A rotational construction laser includes a housing (17) a laser unit (4) located in the laser housing (17), a device (5) for rotating, at least segmentwise, a laser beam (2) of the laser unit (4) within a rotational plane (R) of a rotational member (6) in which the rotating device (5) is supported for rotational about a rotational axis (A) that intersects a beam axis (S) of the rotatable laser beam (2), and an arrangement for inclinably supporting the rotation axis (A) in at least one pivot plane (E1) and including a mounting frame (3) and a universal ball joint support (7) arranged in the mounting frame (3), with the rotating device (5) being located in a central point (M) of a universal ball joint (8) supported in the universal ball joint support (7).

Abstract: An electro-optical hand-held distance measuring instrument (1) with a housing (2) which can be held in the hand and with an electro-optical distance measurement module (3) with an electric beam source (5) for generating an optical measurement beam (S), a beam receiver (8) for receiving portions of the measurement beam (S) that are backscattered by an object to be measured (MO), and an output device (7) for the determined distance (X). A mechanical distance measuring device (9, 11) is connected to the housing (2).

Abstract: A measuring device (6) subjected to gravitational forces and including at least one laterally oscillating, pendulously suspended, support structure (7) for supporting at least one of a measuring element, and optical element, and a suspension element for suspending the support structure and including at least one hinge formed as a tape hinge (21; 40).

Abstract: A rotational constructional laser including a light source (3, 33) for emitting a laser beam (L) and located in the laser housing, a laser beam motor-driven deflection device (7; 50; 74; 104) located in a housing unit (10; 51; 73; 93; 103) secured to and at least partially projecting beyond the laser housing (2; 32, 72; 92; 102) and having a least one beam hole (52, 53) for the laser beam, a device (37) for tilting a rotational axis of the deflection device a detection device for detecting a return laser beam (R) reflected from a display mark and entering the housing unit through the at least one beam hole, an evaluation and control unit connected with the detection device and controlling operation of the tilting device, and an automatically actuatable device (40; 75; 107; 108; 109) for adjusting an axial position of the deflection device (50; 74; 104) with respect to initial axial position of the deflection device in accordance with the detection data obtained in the detection device.

Abstract: A light beam receiver for a laser beam (2) of a laser positioning device comprising a diffuse reflection surface (3) embodies a reflection surface (3) and at least one reflector surface (4a, 4b) facing the laser beam (2) inclined at an angle (&agr;)<45°.

Abstract: A constructional laser including a housing (3) with a light source located inside the housing for emitting a visible laser beam rotatable about a rotational axis, a base plate (11) attached to the housing (3) and provided with an inner thread (25) approximately in a center of the base plate (11), and two handles (12, 13) for lifting and carrying the laser and connected to the base plate (11) with the two handles (12, 13) being spaced from opposite sides of the housing (3) and extending at a right angle from the base plate (11) parallel to a height of the housing (3) toward an upper surface (4) of the housing (3), with the handles (12, 13) having at sides thereof remote from the housing (3), three servo positioners (14, 15, 16), with two of the servo positioners (14, 15) being provided on one handle (12) and with the third, height-adjustable servo positioner (16) being arranged on another handle (13), the three-point arrangement of the servo positioners (14, 15, 16) defining an isosceles triangle, with the con

Abstract: A constructional laser having a light source (5) for emitting a laser beam (L) arranged in housing (2) and rotatable about a rotational axis (A), a motor-driven shaft (14) supported in the housing (2) for rotation about the rotational axis (A) and having an end projecting into a casing (3) at least partially projecting above the housing (2) and having at least one beam hole (7, 8), with the shaft (4) being rotationally connected with the casing (3), and a direction-changing device (9) for the laser beam (L) and supported on the end of the shaft (4) projecting into the casing (3), with the casing (3) having a peripheral wall (33) spaced from the direction-changing device (9) and with the casing being capable of a limited displacement relative to the housing (2), without any contact between the peripheral wall (33) and the direction-changing device (9).

Abstract: Apparatus (1) for applying marks to surfaces, such as walls and ceilings, particularly for use in home and building construction, includes a photoelectric detector device (21-25) for detecting bundled light signals from a light source, such as a laser, arranged at a distance from the surface to be marked. A signal-generating positioning aid (27-28) cooperates with the detector arrangement (21-25) for enabling a user of the apparatus to position it on the surface based on the detected light signals. In addition, the apparatus includes a marking device for applying a mark to the surface when the apparatus is correctly positioned.

Abstract: An apparatus for locating magnetizable material (5, 6) within a structure (4) includes a scanning head (1) with a permanent magnet (28) for producing a magnetic field in the structure (4). Two field plates (30, 31), adjacent one another on only one pole face of the permanent magnet (28), are interconnected by a differential circuit and measure the magnetic field of the magnet disturbed by the magnetizable material (5, 6). The differential values measured by the pair of field plates form a differential measured signal for establishing, after differentiation, the location of the magnetizable material (5, 6) within the structure (4). The location of the magnetizable material (5, 6) within the structure can be shown on a monitor (7) of an evaluation unit (3).

Abstract: In securing an anchor in a borehole in a receiving material, a settable hydraulic dowel compound is introduced into the borehole either before, during or after the placement of the anchor member. The dowel compound includes an expandable component. The diameters of the borehole and the anchor member are selected so that an annular gap extends around the anchor member with the gap having a maximum area of 200 mm.sup.2. The expandable component ensures an increase in the volume of the dowel component above the initial volume in a free expansion procedure.

Abstract: A dowel assembly to be anchored in a borehole in a receiving material includes a container positioned around the axis of the borehole and located between an abutment at one end of the dowel assembly and the receiving material into which the assembly is inserted. The container is formed of two parts with one part being telescopically displaceable into the other. An hydraulic mass capable of expanding when mixed with a reaction liquid is filled into the container. The expandable hydraulic mass maintains the force acting on the dowel assembly when there is relaxation of the force originally generated between the dowel assembly and the receiving material. The container has openings through which the reaction liquid can pass into contact with the hydraulic mass. The hydraulic mass can be activated by immersing the container in water.

Abstract: A motor driven hand-held device for rotating a tool, includes a housing with an axis of rotation containing an electrically conductive liquid mass located within a sealed non-electrically conductive container. A magnetic field is established in the housing by a permanent magnet and a part of the liquid mass is located within the magnetic field. If the housing is turned or twisted around the axis of rotation, relative movement takes place between the liquid mass and the container in the magnetic field. Due to the movement of the mass in the magnetic field, a voltage is induced in the mass and the voltage can be tapped by electrodes extending into the container. The tapped voltage can be used as an electrical signal.

Abstract: A manually guided motorized hand tool used for drilling and/or percussive drilling includes a housing with a mass movably mounted about the drilling axis for movement relative to the housing. A switch is mounted on the housing and is operable by the mass when it moves a certain angular distance relative to the housing. When operated, the switch cuts off the power supply to the hand tool.